The method for trenchless replacement of pipelines
The invention relates to construction and is used when replacing underground pipelines. The new pipeline as its installation tighten into place before deleting the old pipe through a flexible corrugated heat insulating sleeve. At the same time serves hot air between the insulating sleeve and a new pipeline for heating it to a temperature not higher than the temperature of the beginning of the plastic deformation of the material of the new pipeline. If there around the old pipe frozen ground previously in the old pipeline serves the heated air until complete thawing of the soil. Increases the efficiency of the construction works. 1 Il.The invention relates to the construction of production and can be used for trenchless replacement of underground pipelines for various purposes.The known method of trenchless installation or replacement of the pipeline , including the formation of the working and auxiliary pits, the formation between the wells, the tightening in her pipeline. With this formation wells are puncture or by removing the replaced pipeline step-by-step cont the tool pulling head.Known which is the technical entity closest to the proposed technical solution method for trenchless replacement of pipelines , including the formation of the mounting hole, the removal of the old pipe, utrambovyvaya its fragments in the soil and the delay through the previously traversed mounting hole mounted on the surface of the entire length of the new pipeline.The disadvantages of the above methods is the inability to trenchless replacement of pipelines in adverse weather conditions (precipitation and low outdoor temperature) and the presence of permafrost in the area of the pipeline, as in this case, a high probability of getting poorly welded connection of new pipe and it is impossible to pressing the wreckage of the destroyed old pipes in frozen ground because of its nsimemory.Object of the invention is the provision of opportunities for high-quality work on trenchless replacement of pipelines at low outside temperatures, precipitation and frozen ground in the area of the pipeline.The problem is solved in that in the method for trenchless replacement of pipelines, including refraining from the gadfly, according to the invention the new pipeline as its installation tighten in place of the old fixed pipeline through a flexible corrugated heat insulating sleeve with a simultaneous flow between the insulating sleeve and a new pipeline of hot air to heat a new pipeline to a temperature not higher than the temperature of the beginning of the plastic deformation of its material, moreover, the presence around the old pipe frozen ground, in the old pipeline before its elimination served hot air until complete thawing of the soil.The advantage of the proposed method is that the heating of the hot air of a new polymeric tubing, and the protection insulating sleeve provides flexibility of the new pipeline and the possibility of its submission to the old pipe from the surface at low outside temperatures. The flow of heated air into the old pipeline, in the presence around him frozen ground, carries out its defrosting and the possibility of pressing the wreckage of the destroyed old pipeline in the thawed soil. The use of corrugated sleeve provides its flexibility and thermal insulation ability due slimming is proposed in the invention, the flow of hot air in the flexible hose between it and the new pipeline makes possible the continuity of his warm-up without interruption for a period of welding, eliminates repeated attachment and detachment of the heat source increases the flexibility of the new pipeline in case of incomplete heating of the thickness of its walls.The drawing shows a flow chart of the method for trenchless replacement of pipelines.Installation for the implementation of the proposed method, replacing the old pipe 1 on the new pipeline 2 includes a working body 3 (air puncher), power device consisting of a winch 4, a cable 5 and the compressor 6, the device for butt connection of new pipe (welding machine), consisting of bilateral heating element 7 for contact heating ends mounted the new pipeline 2 and the guide clip 8 for connection of pipe ends after melting. The plant is equipped with passed through the casing 9 of the mounting hole 10 of the flexible corrugated insulating sleeve 11, one end of which is in observation wells 12, and the other through the flange 13 with a hole attached to the shelter 14 and through the flexible tube 15 to the heat source 16. Moreover, the ends of the sleeves 11 of the elastic ring 17 is sealed and slidable pressed for a new pipeline 2. The front end of the working body 3 is connected by a cable 5 with the winch 4, Lisala of the proposed method is as follows.With the ground surface prior to meeting with an observation well 12 by means of the working body 3 to form an inclined mounting hole 10 (in the presence of loose soil or sand into the mounting hole 10 simultaneously with the sinking of delaying the same work body 3 metal casing tube 9). Then on the surface of the ground set of the shelter 14. Through the mounting hole 10 is passed a flexible corrugated heat insulating sleeve 11, with one end connecting flange 13 with shelter 14 and the flexible pipe 15 with the heat source 16, and the other is placed in observation wells 12. If there around the old pipe 1 frozen ground free end of the sleeve 11 attached to the old pipe 1 and serves it hot air until complete thawing of the soil. After that, the sleeve 11 is cut off from the old pipe 1. The process of installation of the new pipeline 2 is carried out in the shelter 14. The ends of the links of the new pipeline 2 is installed in the guide clip 8 between bilateral heating element 7 and incubated for the specified time before melting. Then the heating element 7 is removed and the ends of the links of the new pipeline 2 press using the guide clip 8 to the formation of strong welded seasonale link. By the end, passing through the sleeve 11, the new pipeline 2 attach the working body 3 and enter it into the old pipe 1. The delay of the new pipeline 2 is carried out with the help of the working body 3 and winch 4 cable 5, spread through the old pipe 1. This operation periodically alternates with the operation of welding the new pipeline 2. The process of replacing the old pipe 1 is performed step by step. Moving inside the old pipe 1, the working body 3 destroys it, utrambovyvaya debris in the soil, and at the same time tighten in the formed hole new pipeline 2 larger outer diameter than the old one.The proposed method of replacing pipelines industrially applicable and allows you to perform high-quality replacement pipelines year-round regardless of weather and climatic conditions.Sources of information1. RF patent №2135874, CL 7 F 16 L 1/028, 1998.2. RF patent №2105919, CL 7 F 16 L 1/028, 1998.
ClaimsThe method for trenchless replacement of pipelines, including removing the old pipe and the delay through the previously traversed the mounting hole of the new pipeline, characterized in that the new pipeline as it is m UCAV with simultaneous flow between the insulating sleeve and a new pipeline of hot air to heat a new pipeline to a temperature not higher than the temperature of the beginning of the plastic deformation of the material, moreover, the presence around the old pipe frozen ground in the old pipeline before its elimination served hot air until complete thawing of the soil.
FIELD: construction, applicable for trenchless laying and replacement of underground pipe-lines.
SUBSTANCE: a reciprocating striker is positioned in the casing of the pneumatic percussion mechanism. The air-distributing system of the mechanism includes the front and rear working chambers, inlet and exhaust valves and a fixture for closing and opening of the exhaust channels made in the form of a spring-loaded end face stopper coupled to a tractive member. At actuation of the pneumatic percussion mechanism, before the supply of compressed air, the exhaust channels are closed, they are opened after the inner cavities of the pneumatic percussion mechanism are filled with compressed air.
EFFECT: provided automatic cyclic action of the pneumatic percussion mechanism.
3 cl, 3 dwg
FIELD: construction engineering; erection of pipe lines in thawing permafrost soils and in flooded areas.
SUBSTANCE: proposed method includes ditching at trench with widened areas located at definite distances and pipe line is laid on bottom of trench. Pipe line is covered with flexible rugs and bottom of trench at widened areas is also covered with rugs; edges of rugs are fastened in widened areas and trench is filled. Used as anchor member are cylindrical textile containers placed in lugs of flexible rugs in parallel with pipe line and filled with soil. Prior to fastening the edge sections of flexible rugs, each of them is tightened at fixation of tension; preliminary tension of edge sections is effected during filling the widened areas and trench soil ensuring contact of flexible rugs with bottom of widened areas and trench. Filling the widened areas and trench is performed in direction towards pipe line, symmetrically relative to it.
EFFECT: enhanced reliability of attachment of pipe line at 0required marks.
13 cl, 4 dwg
FIELD: construction engineering; erection of pipe lines in permafrost soils at alternating terrain.
SUBSTANCE: trench in smooth terrain and in sections cut by hydrographic net is dug in active layer at depth sufficient for location of upper generatrix of pipe line above level of daily level. Prior to laying the pipe line, bottom walls and berms of trench are lined with cloth of non-woven synthetic material. backfill soil is placed in ballasting polymer panel-type devices or in ballasting polymer container-type units suspended from pipe line. Anti-erosion partitions made from non-woven synthetic material are formed in sloping sections together with funnel whose neck is located downward of water flow embracing the pipe line at specified clearance between neck and pipe line. Funnel is formed by covering the natural slope of backfill soil by free lower edge of non-woven synthetic material with ballasting polymer panel-type or ballasting polymer container-type devices placed on lower portion of funnel followed by subsequent removal of embankment protecting the pipe line. As far as sections of route cut by hydrographic network are concerned, anti-erosion partitions are formed in trench at transients with opposite slopes of microterrain; anti-erosion partitions are made from anti-erosion cloths and backfill soil is placed n soil-filled weighting materials attached to pipe line. At low points where opposite sections cross, water pass or water bypass structure is formed in trench.
EFFECT: enhanced reliability; reduced scope of earth-moving work; enhanced stability of pipe line in horizontal plane.
9 cl, 8 dwg
FIELD: pipe line transport; major repair of pipe lines.
SUBSTANCE: proposed method includes introducing the front end of pipe into damage pipe and forming hermetic cavity in inter-pipe space; then, pressure air (gas) is charged into hermetic cavity for motion of new pipe inside damaged pipe, after which piston is fitted at end of new pipe and detachable flange is connected to rear end of damaged pipe; motion of new pipe is effected by periodic charging of air into hermetic cavities; each hermetic cavity is bounded by piston and seal.
EFFECT: reduction of tractive force.
FIELD: construction engineering; erection of underground pipe lines in permafrost soils, in bogs and in flooded and marshy areas.
SUBSTANCE: proposed polymer container ballasting unit has two distance rigidity frames located on both sides from pipe line, reservoirs made from polymer commercial cloth and filled soil which are secured to said frames, anti-erosion partitions and upper and lower weighting belts. Distance rigidity frames are curvilinear in form and their height exceeds diameter of pipe line being ballasted. Bend of each frame is made at obtuse angle and lower part of each frame is inclined towards pipe line relative to trench bottom. Polymer commercial cloth laid along pipe line makes distance frame rest against ground of trench bottom both in filling the reservoirs with soil and at action of pushing-out load.
EFFECT: extended functional capabilities.
3 cl, 1 dwg
FIELD: laying or reclaiming pipes.
SUBSTANCE: method includes removing upper layer of spoil, developing side trench with disposal the spoil by damping. The development of side trenches is performed step-by-step. The stripped trench is provided with stripping machine, the side trench are deepened by the working members of the stripping machine below the bottom of the pipeline and pipeline is continuously stripped by trenching machine and stripping machine when it moves forward. The stripping machine has frame with running carriages, clamps, supporting members and mechanism for forward motion.
EFFECT: enhanced efficiency.
3 cl, 4 dwg
SUBSTANCE: pipeline is laid on the concave part of the longitudinal section of the trench bottom on the layer of soft soil and is locked by filling one or two layers of soil with compacting. Screw vertical anchors and load-carrying belts are then mounted. Before filling the trench, the space between the belt and pipeline is provided with a cloth of unwoven synthetic material.
EFFECT: enhanced reliability of pipeline locking.
FIELD: pipeline transport.
SUBSTANCE: flexible pipeline comprises several pulp lines provided with chambers with ball check valves and interconnected through piping diaphragms. The outer surface of the pulp line is provided with a displacement device for movement along the pipeline. The sections of pulp lines receive shell made of layers of syntactic and polyurethane, the ratio of thicknesses of which is (10-4):1. The displacement device affects the piping diaphragm, pumps hydraulic mixture from the bottom section to the next one which is arranged above the check valve, and moves along the outer side of the pulp line to the next piping diaphragm mounted above.
EFFECT: expanded functional capabilities.
SUBSTANCE: pipeline has triply connected supports mounted on the stable sections above and under the slope subject to creep, one connected supports arranged over the subject to creep slope, and deformation compensator. The distance between the upper support and site of the deformation compensator arranged below the slope subject to creep is determined from the formula proposed.
EFFECT: enhanced reliability of the pipeline.
SUBSTANCE: working member comprises rotors provided with teeth arranged symmetrically with respect to the axis of pipeline and provided with drive and mechanism for bringing the rotors together and moving them apart. Each rotor is provided with cleaning device which is arranged behind the rotor and secured to the unmovable segment of the working member for keeping it unmovable or permitting rotation. The cleaning members permanently co-operate with the outer side of the rotor.
EFFECT: enhanced efficiency.